4p Folie Forchheim Gmbh

Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co Kg

Walter Guenter

Thomas Ihde

The invention relates to a method for producing a multilayer coextrudate, comprising a plastic layer that has release properties vis-vis adhesives, the release-property producing materials being disposed in the plastic layer. When the coextrudate is produced, a first web(support web I) is provided on the one side of which an adhesive layer is disposed, followed by the plastic layer having the release properties, which in turn is linked with a second web (support web II). The release layer does not show substantial migration with respect to the adhesive and the release effect does not substantially change afterwards, especially during storage.

Method for producing a multilayer coextrudate and a film structure produced by this method

Plastic layer that has release properties towards adhesives, where the materials that produce the release properties are incorporated in the plastic layer and can be extruded with it.

Plastic separating layer

A plastic film is provided that has release properties towards adhesives. The materials that produce the release properties are incorporated in the plastic layer and can be extruded with it. The materials responsible for producing the release properties are organo-silicone graft polymers or organo-silicone block copolymers obtained from mercapto-functionalized silicones, such as polydimethyl-siloxanes. The materials are produced by modifying SiH-containing polysiloxane with organic, polymerizable monomers of the type that can be produced with acrylates, such as methylmethacrylate, butylacrylate, styrene or vinyl acetate.

Growing community of inventors

Forchheim, Germany

Walter Guenter